Abstract:

The arc-extinguishing system of automatic transfer switching equipment is optimized, the on-off problem is solved, and the on-off capacity of the product is improved.Based on the analysis of the structure,function and test results of the arc extinguishing system of a 250 A automatic transfer switching equipment, the arc striking structure is added in the arc-extinguishing system,and the spacing between the contact and the grid is reduced to form an improved scheme.Finally,the effectiveness of the improved scheme is verified by the on-off capacity tests.

Key words: automatic transfer switching equipment, arc-extinguishing system, on-off capacity, arc striking structure